They are all new, do I need to wash them all in different batches? How many times?
Hemp fleece flats and prefolds
Bamboo flats
Cotton flats
Pockets with fleece lining (do pockets and covered even need a rinse before first use?!)

I'm due in two weeks and would like to prep half my batch now. Thanks!

I would wash any pockets/covers once separately just to get anything from manufacturing off. The rest can be prepped together. Wash hot, dry hot...I typically do three washes then run a bit of water on them and see if it soaks in immediately. If so, you're good to go! If not, run another cycle. I've also seen people who just throw it in with other laundry loads (with only no/plant-based fabric softener) after the first wash. I just never prep smaller amounts to be able to do that!

I would wash any pockets/covers once separately just to get anything from manufacturing off. The rest can be prepped together. Wash hot, dry hot...I typically do three washes then run a bit of water on them and see if it soaks in immediately. If so, you're good to go! If not, run another cycle. I've also seen people who just throw it in with other laundry loads (with only no/plant-based fabric softener) after the first wash. I just never prep smaller amounts to be able to do that!

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So is this how you check absorbency? I'm totally new to CD. Just ordered some new and used pockets today. And was wondering about prepping/washing.
The checking for absorption thing, is that good to do if I'm having leaks too?